Temporal evolution of atmospheric cascade glow discharge with pulsed discharge and radio frequency discharge

Abstract

Atmospheric cascade discharges with pulsed discharge and radio frequency (RF) discharge were experimentally investigated by the temporal evolution of discharge spatial profile and intensity. The indium tin oxide (ITO) coated glass was employed as the transparent electrode to capture the discharge distribution above the electrode surface. It is demonstrated that in the pulsed discharge with dielectric barrier, the first discharge at the rising edge of pulse voltage is uniformly ignited and then forms an expanding plasma ring on the ITO electrode surface, which shrinks to the same diameter as that of bare stainless steel electrode with the generation of second discharge at the falling edge of pulse voltage. The discharge profiles along the electrode surface and discharge gap of the successive RF discharge are dependent on the intensity and spatial distribution of residual plasma species generated by the pulsed discharge, which is determined by the time interval between the pulsed discharge and RF discharge. It is demonstrated that the residual plasma species before the RF discharge ignition help to achieve the stable operation of RF discharge with elevated intensity.

Influence of non-uniform electric field distribution on the atmospheric pressure air dielectric barrier discharge

“…The utilization of nanosecond pulsed voltage waveform can restrain the development of electron avalanches in the nanosecond time scale, preventing the generation of local high density charged particles [14,15]. In recent years, with the advance of the power electronics technology, the research of atmospheric pressure DBD based on nanosecond pulsed power supply has been widely carried out [11,[16][17][18]. However, nanosecond pulsed power supplies are costly, limited in power, and susceptible to electrode structure because of the capacitive load and the nanosecond voltage rise time.…”